I have a PC (with Windows 7) which its network adapter didn't work fine. The network adapter leds used to blink and Windows recognized the active connection, but it couldn't get a DHCP address from my router (the DHCP configuration its OK). I used a LiveUSB Ubuntu to test it, and it worked pretty fine, it got the new DHCP IP as supposed. After that, I supposed that a new Windows installation (and update) was required to make it work fine, so I installed Windows 8, I tested it with a static IP too, and
--- NOW THE PROBLEM ---
is the same as Windows 7: I can't access to the internet with Windows (even with a new installation). PD: BIOS is restored with default values.
What happened in there? I searched on Internet possible problems/solutions and this is my last resource :(
Thank you so much.